Japanning- pins



UNITED STATES PATENT PFTC.

JOHN J. HOWE AND TRUMAN PIPER, OF DERBY, CONNECTICUT, ASSIGNORS TO HOWE MANUFACTURING COMPANY, OF DERBY, CONNECTICUT.

JAPANNING PINS.

Specification of Letters Patent No. 15,111, dated. June 10, 1856.

To all whomz't may concern Be it known that we` JOHN J. HowE and TRUMAN PIPER, of Derby, in the State of Connecticut, have invented a new and useful Improvement in the Process of Japanning Pins, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which- Figure l, represents a vertical section of a vat with pins hanging with their heads downward in the Japan varnish,or compound contained in the vat. Fig. 2, represents a like view of the same vat with the pins hanging by their heads with the points downward in the Japan varnish or compound; and Fig. 3 is a face view of a pierced plate of metal in which the pins are inserted.

The same letters indicate like parts in all the figures.

In our improved process the pins to be japanned are stuck into al sheet of paper and at right angles or nearly so to the surface thereof, and to such a depth that the heads will project to Some distance from the surface of the sheet of paper. And in that condition the pins are dipped head foremost to the required depth in the Japan varnish or compound, and when suliciently coated they are removed to a suitable oven to bake the japan, and when the apan is properly dried and baked the pins are then hung by their heads and dipped points downward to the required depth in the Japan varnish or compound to coat the remaining portion not coated when dipping them head foremost, and when so dipped they are again put in a suitable oven to dry and bake the japan in the usual mode of performing the wellknown process of japanning.

We will now describe the mode of applying our invention which we have practiced with success.

The Japan varnish or compound is to be prepared in the usual and well known way, and put into a vat a to a suitable depth. Above this vat there is an open frame provided with four vertical guide rods c, one only shown in the drawings, which eX- tend down therefrom and which are adapted to slide in suitable loops or ways attached to the outside of the vat to guide the frame in its movements up and down given by a screw e fitted to turn in an arm projecting from the frame b and tapped into a nut in a projection f from the side of the vat.

By means of a lnachine .invented by us and for which we contemplate making application for Letters Patent of even date with this application, we stick a large number of pins g through holes in a thin plate of metal L and into a sheet of paper held against the back of the said metal plate. The holes in the metal plate are large enough to receive the shank or barrel of the pins freely but not to permit the heads to pass through; we stick the pins into the sheet of paper to about one third their length from the point. We then take the plate with the sheet of paper thus charged with pins, and lay the metal of the pins ha'ngingwdvnward, the shanks being held by the grip of the paper; and then, by turning the screw, let down the frame until that part of the pins depending below the plate, is immersed in the Japan varnish or compound, and when thoroughly coated we draw up the frame and carry the plate with the pins to, and put it in an oven such as is usually employed for baking japan, and there leave it the required length of time well known to those acquainted with the process of japanning. And so we proceed until the required number have been dipped and baked.

When the pins, treated as above described, are taken from the oven, we turn the metal plate upside down and draw 0H the sheet of paper so that all the pins will hang in the plate by their heads. The plate is then again placed on the frame Z) but with the points downward and dip the pins in the Japan varnish or compound points downward, and to such depth that all that portion of the surface of the pins which was not dipped in the previous operation shall become coated, and then we again put them in the oven to be baked as before to complete the process. In this way we are enabled to thoroughly coat the entire surface of the pins and to bake the japan without injury to the surface, and avoid all those imperfections on the surface which are unavoidable when japanned by any other process.

It will be obvious from the foregoing that the pins may be dipped and baked irst one end and then the other by simply sticking them in a sheet of paper, or equivalent substance, and after the first, and before the second dipping and baking, sticking them a little farther into the paper that in succession the entire surface may be dipped and ing portion, substantially as and for the purpose specified.

2. And We also claim controlling the pin during the process, substantially as described, by sticking the pins into the sheet of paper through holes in a plate of metal or equivalent substance the said holes being of sufficient size for the free passage of the shanks or barrels of the pins, but not for the heads so that after the first dipping and baking, by reversing the plate and pulling olf the sheet of paper the pins will hang by their heads for the second dipping and baking, as set forth'.

JNO. J. HOVE. Y TRUMAN PIPER. Vitnesses:

D. B. D. FOREST, WVM. .E. DoWNs. 

